EP 1429501 A1 20040616 - System and method for path compression optimization in a pipelined hardware bitmapped multi-bit trie algorithmic network search engine
Title (en)
System and method for path compression optimization in a pipelined hardware bitmapped multi-bit trie algorithmic network search engine
Title (de)
Vorrichtung und Verfahren für die Optimierung der Pfadkomprimierung für algorithmische Suchgeneratoren mit einer pipelined hardware bit kartierten multi Bit Trie-Struktur
Title (fr)
Dispositif et procédé pour l'optimisation de compression d'un chemin dans un dispositif matériel d'un engin de recherche algorithmique de type pipeline, bitmapped multibit trie
Publication
Application
Priority
US 31733802 A 20021212
Abstract (en)
For use in a pipeline network search engine of a router, a path compression optimization system and method is disclosed for eliminating single entry trie tables. The system embeds in a parent trie table (1) path compression patterns that comprise common prefix bits of a data packet and (2) skip counts that indicate the length of the path compression patterns. The network search engine utilizes the path compression patterns and the skip counts to eliminate single entry trie tables from a data structure. Each path compression pattern is processed one stride at a time in subsequent pipeline stages of the network search engine. The elimination of unnecessary single entry trie tables reduces memory space, power consumption, and the number of memory accesses that are necessary to traverse the data structure. <IMAGE>
IPC 1-7
IPC 8 full level
H04L 12/56 (2006.01)
CPC (source: EP US)
H04L 45/00 (2013.01 - EP US); H04L 45/54 (2013.01 - EP US); H04L 45/74591 (2022.05 - EP US)
Citation (search report)
- [A] US 5781772 A 19980714 - WILKINSON III HUGH M [US], et al
- [A] WO 0163852 A1 20010830 - TELLABS OY [FI], et al
- [A] RUIZ-SANCHEZ M A ET AL: "SURVEY AND TAXONOMY OF IP ADDRESS LOOKUP ALGORITHMS", IEEE NETWORK, IEEE INC. NEW YORK, US, vol. 15, no. 2, March 2001 (2001-03-01), pages 8 - 23, XP002901792, ISSN: 0890-8044
- [A] NILSSON S ET AL: "IP-ADDRESS LOOKUP USING LC-TRIES", IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, IEEE INC. NEW YORK, US, vol. 17, no. 6, June 1999 (1999-06-01), pages 1083 - 1092, XP002901790, ISSN: 0733-8716
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1429501 A1 20040616; EP 1429501 B1 20070207; DE 60311631 D1 20070322; JP 2004194343 A 20040708; US 2004114587 A1 20040617; US 7715392 B2 20100511
DOCDB simple family (application)
EP 03257793 A 20031211; DE 60311631 T 20031211; JP 2003415101 A 20031212; US 31733802 A 20021212